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Wyszukujesz frazę "Verification" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Offline signature identification and verification using noniterative shape context algorithm
Autorzy:
Adamski, M.
Saeed, K.
Powiązania:
https://bibliotekanauki.pl/articles/333019.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
weryfikacja podpisu
offline signature verification (SV)
signature identification
shape context method
Opis:
The paper presents experimental results on offline signature identification and verification. At the first stage of the presented system, the binary image of the signature undergoes skeletonization process using KMM algorithm to have a thinned, one pixel-wide line, to which a further reduction is applied. For each thinned signature image a fixed number of points comprising the skeleton line are selected. The recognition process is based on comparing the reference signatures with the questioned samples using distance measure computed by means of Shape Context algorithm. The experiments were carried out using a database containing signatures of 20 individuals. For the verification process random forgeries were used to asses the system error. The main advantage of the presented approach lies in utilizing only one reference signature for both identification and verification tasks, whereas the achieved results are comparable with respect to the systems that use several training samples per subject.
Źródło:
Journal of Medical Informatics & Technologies; 2009, 13; 47-52
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Offline signature verification based on shape contexts using shared and user-specific thresholds
Autorzy:
Adamski, M.
Saeed, K.
Powiązania:
https://bibliotekanauki.pl/articles/333777.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
offline signature verification (SV)
shape contexts
weryfikacja podpisu w trybie offline
Opis:
In this paper we present a system for offline signature verification based on Shape Context Descriptors. The system input are binarized images of handwritten signatures from GPDS database available for non-commercial research. During preprocessing each signature image is thinned using KMM algorithm in order to obtain 1-pixel wide skeleton. The feature vector is built from Shape Context Descriptors computed for selected points on skeletonized signature line. The verification process is based on the distance measure that uses Shape Context Descriptors. The presented system is evaluated using random and skilled forgeries with shared and user-specific thresholds.
Źródło:
Journal of Medical Informatics & Technologies; 2013, 22; 195-201
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Signature verification using contextual information enhancement and dynamic programming
Autorzy:
Adamski, M.
Saeed, K.
Powiązania:
https://bibliotekanauki.pl/articles/332874.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
weryfikacja podpisu online
programowanie dynamiczne
online signature verification
feature context
dynamic programming
Opis:
This paper presents the results of experiments on online signature verification. Information gathered during the signing process like pen trajectory, pressure, elevation and altitude is utilized to prove the authenticity of a signature or to detect a forgery attempt. Signature verification task is carried out by means of the Template Matching approach. The presented method is based on the signature description in terms of its local features and their relations. The comparison of features in the reference and tested signatures is conducted using Dynamic Time Warping technique.
Źródło:
Journal of Medical Informatics & Technologies; 2008, 12; 35-40
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Recurrent Neural Networks for User Verification based on Keystroke Dynamics
Autorzy:
Kobojek, P.
Saeed, K.
Powiązania:
https://bibliotekanauki.pl/articles/307650.pdf
Data publikacji:
2016
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
biometrics
GRU networks
keystroke dynamics
LSTM networks
recurrent neural networks
user verification
Opis:
Keystroke dynamics is one of the biometrics techniques that can be used for the verification of a human being. This work briefly introduces the history of biometrics and the state of the art in keystroke dynamics. Moreover, it presents an algorithm for human verification based on these data. In order to achieve that, authors’ training and test sets were prepared and a reference dataset was used. The described algorithm is a classifier based on recurrent neural networks (LSTMand GRU). High accuracy without false positive errors as well as high scalability in terms of user count were chosen as goals. Some attempts were made to mitigate natural problems of the algorithm (e.g. generating artificial data). Experiments were performed with different network architectures. Authors assumed that keystroke dynamics data have sequence nature, which influenced their choice of classifier. They have achieved satisfying results, especially when it comes to false positive free setting.
Źródło:
Journal of Telecommunications and Information Technology; 2016, 3; 80-90
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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